/////////////////////////////////////////////////////////////////////////////// 
// Copyright (C) 2002-2023, Open Design Alliance (the "Alliance"). 
// All rights reserved. 
// 
// This software and its documentation and related materials are owned by 
// the Alliance. The software may only be incorporated into application 
// programs owned by members of the Alliance, subject to a signed 
// Membership Agreement and Supplemental Software License Agreement with the
// Alliance. The structure and organization of this software are the valuable  
// trade secrets of the Alliance and its suppliers. The software is also 
// protected by copyright law and international treaty provisions. Application  
// programs incorporating this software must include the following statement 
// with their copyright notices:
//   
//   This application incorporates Open Design Alliance software pursuant to a license 
//   agreement with Open Design Alliance.
//   Open Design Alliance Copyright (C) 2002-2023 by Open Design Alliance. 
//   All rights reserved.
//
// By use of this software, its documentation or related materials, you 
// acknowledge and accept the above terms.
///////////////////////////////////////////////////////////////////////////////


using SmartPlant.OdKernelLib.ExSelection;
using SmartPlant.OdKernelLib.ExView;
using Teigha.Core;
using Teigha.TD;

namespace SmartPlant.OdDrawingsLib.ExSelection
{
    public class OdExViewSelectionObjectByRectangle
    {
        private OdGsView m_targetView;
        private OdDbObjectId m_spaceId;

        private OdGsDCPoint startSelectionPoint;
        private OdGsDCPoint endSelectionPoint;
        private OdExSelectionRectangleFrame selectionRectangle;

        private bool IsStarted { get { return startSelectionPoint != null; } }

        public void Init(OdDbObjectId spaceId, OdGsView view)
        {
            m_targetView = view;
            m_spaceId = spaceId;
        }

        public void UnInit()
        {
            m_targetView = null;
            m_spaceId = null;
            InterruptSelection();
        }

        public bool StartSelect(int xMouse, int yMouse)
        {
            startSelectionPoint = new OdGsDCPoint(xMouse, yMouse);
            selectionRectangle = new OdExSelectionRectangleFrame(OdExGsDeviceHelpers.GetWorldCoordinateByScreen(m_targetView, xMouse, yMouse));
            selectionRectangle.AddToView(m_targetView);
            return true;
        }

        public bool ChangeSelectionRectangle(int xMouse, int yMouse)
        {
            if (!IsStarted)
                return false;

            selectionRectangle.setValue(OdExGsDeviceHelpers.GetWorldCoordinateByScreen(m_targetView, new OdGePoint2d(xMouse, yMouse)));

            return true;
        }

        public bool FinishSelect(int xMouse, int yMouse, OdDbObjectIdArray selectedObjects)
        {
            if (!IsStarted)
                return false;

            CheckInitialization();

            endSelectionPoint = new OdGsDCPoint(xMouse, yMouse);

            OdGsDCPoint[] findPoints = new OdGsDCPoint[]
            {
          startSelectionPoint,
          endSelectionPoint
            };

            OdExTopLevelSelectionReactor selectionReactor = new OdExTopLevelSelectionReactor(selectedObjects, m_spaceId);
            m_targetView.select(findPoints, selectionReactor, startSelectionPoint.x < endSelectionPoint.x ? OdGsView.SelectionMode.kWindow : OdGsView.SelectionMode.kCrossing);

            InterruptSelection();

            return true;
        }

        private void CheckInitialization()
        {
            if (m_targetView == null || m_spaceId == null)
                throw new Exception("OdExViewSelectionObjectsByMouse not initialized");
        }

        private void InterruptSelection()
        {
            if (selectionRectangle != null && m_targetView != null)
                m_targetView.erase(selectionRectangle);

            startSelectionPoint = null;
            endSelectionPoint = null;

            selectionRectangle = null;
        }
    }

}